EP0074865A3 - Expandable and contractible local area network system - Google Patents

Expandable and contractible local area network system Download PDF

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Publication number
EP0074865A3
EP0074865A3 EP82401439A EP82401439A EP0074865A3 EP 0074865 A3 EP0074865 A3 EP 0074865A3 EP 82401439 A EP82401439 A EP 82401439A EP 82401439 A EP82401439 A EP 82401439A EP 0074865 A3 EP0074865 A3 EP 0074865A3
Authority
EP
European Patent Office
Prior art keywords
stations
network
station
local area
client station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP82401439A
Other languages
German (de)
French (fr)
Other versions
EP0074865A2 (en
Inventor
David Michael Bryant
Ryn Christopher Corbeil
Michael Alexander Malcolm
Lawrence Douglas Rogers
Donald Reid Thompson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unisys Corp
Original Assignee
Burroughs Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Burroughs Corp filed Critical Burroughs Corp
Publication of EP0074865A2 publication Critical patent/EP0074865A2/en
Publication of EP0074865A3 publication Critical patent/EP0074865A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/06—Addressing a physical block of locations, e.g. base addressing, module addressing, memory dedication
    • G06F12/0646—Configuration or reconfiguration
    • G06F12/0669—Configuration or reconfiguration with decentralised address assignment
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4204—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus
    • G06F13/4208—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus being a system bus, e.g. VME bus, Futurebus, Multibus
    • G06F13/4213—Bus transfer protocol, e.g. handshake; Synchronisation on a parallel bus being a system bus, e.g. VME bus, Futurebus, Multibus with asynchronous protocol
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/407—Bus networks with decentralised control
    • H04L12/413—Bus networks with decentralised control with random access, e.g. carrier-sense multiple-access with collision detection (CSMA-CD)
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass

Abstract

This disclosure relates to a system and method for the synchronization of variable-length messages being transmit­ ted between stations of a local area contention network where the messages are made up of a variable number of fixed-length packets. This sytem is adapted for automatic address assignment of different stations of the network so that the network may be expanded or contracted by adding stations and removing stations respectively. In this manner, a very reliable network is provided in that the failure of any particular station does not interfere with the functioning of the other stations in the network or the network itself. In addition, the system includes provision for associating various server stations with a given procedure so that a client station may broadcast a request for a procedure and corresponding server stations will send the response to the client station containing the network identification of the server station. If two or more stations contain the particular procedure called for, the first one to respond to the client station is selected.
EP82401439A 1981-08-27 1982-07-30 Expandable and contractible local area network system Withdrawn EP0074865A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US296952 1981-08-27
US06/296,952 US4430651A (en) 1981-08-27 1981-08-27 Expandable and contractible local area network system

Publications (2)

Publication Number Publication Date
EP0074865A2 EP0074865A2 (en) 1983-03-23
EP0074865A3 true EP0074865A3 (en) 1985-11-06

Family

ID=23144237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401439A Withdrawn EP0074865A3 (en) 1981-08-27 1982-07-30 Expandable and contractible local area network system

Country Status (3)

Country Link
US (1) US4430651A (en)
EP (1) EP0074865A3 (en)
JP (1) JPS5836048A (en)

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US4689786A (en) * 1985-03-21 1987-08-25 Apple Computer, Inc. Local area network with self assigned address method
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US4771286A (en) * 1986-07-28 1988-09-13 Honeywell Bull Inc. Lan controller having split bus design
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US4831518A (en) * 1986-08-26 1989-05-16 Bull Hn Information Systems Inc. Multiprocessor interrupt rerouting mechanism
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US4818984A (en) * 1986-11-26 1989-04-04 American Telephone And Telegraph Company, At&T Bell Laboratories Broadcasting messages in a distributed processing system
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US4964038A (en) * 1987-10-28 1990-10-16 International Business Machines Corp. Data processing system having automatic address allocation arrangements for addressing interface cards
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US4939727A (en) * 1988-12-30 1990-07-03 At&T Bell Laboratories Associated memory computer with floating non-wired cells
US4894826A (en) * 1989-01-30 1990-01-16 Honeywell, Inc. Message generating communication apparatus having a message preamble format allowing parts of certain messages to be ignored
US5023891A (en) * 1989-07-25 1991-06-11 Sf2 Corporation Method and circuit for decoding a Manchester code signal
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US5245604A (en) * 1990-03-05 1993-09-14 Lone Wolf, Inc. Communicating system
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US5577211A (en) * 1994-05-11 1996-11-19 Ibm Corporation System and method using chained structure queues for ordering of message delivery between connected nodes wherein unsuccessful message portion is skipped and retried
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US6633577B1 (en) 1997-03-26 2003-10-14 Nec Corporation Handshaking circuit for resolving contention on a transmission medium regardless of its length
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US4287592A (en) 1979-05-23 1981-09-01 Burroughs Corporation Method and apparatus for interfacing stations in a multiloop communications system
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Non-Patent Citations (1)

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Title
IBM TECHNICAL DISCLOSURE BULLETIN, vol. 23, no. 5, October 1980, pages 1811-1812, New York, US; J.G. SAMS: "Node processor for distributed system control" *

Also Published As

Publication number Publication date
EP0074865A2 (en) 1983-03-23
US4430651A (en) 1984-02-07
JPS5836048A (en) 1983-03-02
JPH0344464B2 (en) 1991-07-08

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Designated state(s): BE DE FR GB IT NL

17P Request for examination filed

Effective date: 19830421

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Owner name: BURROUGHS CORPORATION (A DELAWARE CORPORATION)

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Effective date: 19870309

STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19870918

RIN1 Information on inventor provided before grant (corrected)

Inventor name: THOMPSON, DONALD REID

Inventor name: MALCOLM, MICHAEL ALEXANDER

Inventor name: BRYANT, DAVID MICHAEL

Inventor name: ROGERS, LAWRENCE DOUGLAS

Inventor name: CORBEIL, RYN CHRISTOPHER